DyNaMiTe KiD

heres the kind of wastegate i received, is used, whats with the hole ontop of the wastegate,what goes in there.. and if possible can someone tell me how to set it up,how to hook it up to a avcr and the ts04. how do i set the minimum psi to run off w/g...

I have 90 turbo rx7

ts04 turbo
divided manifold
avc-r
proper fuel and engine mgmt mod coming.





Thanks
greddy w/g pic of ebay

RotaryExperimental

It looks like it take a hose barb fitting. It should be the vacuum port. somebody correct me if im wrong please

0110-M-P

iTrader: (10)

Yes that is a vacuum port, but I believe it is suppose to have two, one on top and the other on the side like on the HKS wastegates. Not sure about the greddy one though.

M-P

DyNaMiTe KiD

Ya found out what that hole is..just a hole to atmosphere the excess boost..

vspecpgt

the hole on top? no dude.... thats what that big hole on the side is for...the hole on top is a vaccum port....

DyNaMiTe KiD

i'll take a pic to clear up some confusion...I just dont want to mess up when i have to put it together..

THanks for the response

DyNaMiTe KiD

Nevermind about the pic, i'll try to explain it best as i could.. alright i have the same wastegate but a bit bigger... I have that same empty hole you see in ebay, pic#2. and then i have the adjustable screw like in pic#2. i know the screw is to adjust the spring but what is the big empty hole on top of the wastegate for(is that what you refer to as the vaccum port)..

Thanks..

IGY

When using the avcr you would hook the boost control solenoid up to that hole(missing fitting). There is a hole/fitting on the side that will be hooked up to the piping coming from the turbo before the throttle body. The hole is a for a 1/8" NPT fitting.

maxcooper

The best way to understand this stuff is to seek understanding of how external wastegates work in general. They are all pretty much the same in terms of basic operation. The wastegate opens (lets the exhaust around the turbine) when you supply pressure to the side port. The spring pressure determines how much pressure is required to open it. The exhaust pressure on the valve also plays a role in how much pressure is required, but generally the wastegate opens at some amount of pressure to the side port. When you hook it up, you always supply full intake manifold pressure to the side port.

To raise the boost above the "spring pressure" you supply some pressure to the top port. That is what it is there for. Pressure to the top port will help to hold the wastegate shut.

With an electronic boost controller, you normally have a solenoid valve that cycles to control the pressure to the top port. When power is applied to the solenoid, it routes the manifold boost pressure to the top port on the wastegate (increasing the boost). When there is no power to the solenoid it vents the top port to atmosphere to avoid trapping air in the top of the wastegate. The boost controller rapidly "cycles" the solenoid to control how much pressure is applied to the top port. That controls boost. More pressure to the top port gives higher boost.

You might have to buy a fitting for the top port; if you do they tend to be 1/8 NPT threads, and you can get brass fittings at any hardware store.

So, with the AVC-R, you hook it up just like the instructions that come with it illustrate. The instructions are also available for viewing at http://www.apexi-usa.com/ if you don't have them. The solenoid has 3 ports (Normally Open [NO], Normally Closed [NC], and Common [COM]). You will only be hooking hoses to 2 of the ports. You might have to move one of the nipples if they aren't on the right ports for your external wastegate application (bottom of page 44 of the manual, which is page 48 of the PDF).

Supply your intake manifold boost pressure to the NC port on the solenoid valve, and connect the COM port of the solenoid to the top of the wastegate. And of course the manifold boost pressure should be connected directly to the side port on the wastegate.

Understanding how it works is essential for troubleshooting. Fortunately, it is a pretty simple system -- taking a few minutes to understand it is definitely worth your time.

Sorry to be so preachy, but I see a lot of posts (not necessarily this thread, but generally) that seem to lack a basic understanding of how an external wastegate works. Hopefully this thread will help spread some understanding.

-Max

DyNaMiTe KiD

I looked at my avcr solenoid last night and read up some info about no, nc, com on this board and how to hook it up, and explaining that empty hole simplifies it even more. I should be alright with it now, btw its a type r wastegate with a 11-14 psi spring right now.

Much appreciated